Shu Guang
Shu Guang
Engineered for stability and high-performance electrical protection.
In the modern electrical grid, CustomPtFuses (Potential Transformer Fuses) serve as the primary line of defense for expensive voltage sensing equipment. Globally, as energy grids transition toward decentralization and renewable integration, the demand for precision-engineered PT fuses has reached an all-time high. These fuses must operate with extreme accuracy to prevent catastrophic failure of instrument transformers during short-circuit events.
Industrial giants in Europe, North America, and the Middle East are shifting their procurement strategies towards manufacturers who can offer bespoke specifications. Off-the-shelf solutions no longer meet the rigorous safety margins required for specialized industrial plants, offshore wind farms, and data center power modules. This is where the "Custom" aspect of PT fuses becomes a critical market differentiator.
The industry is moving from simple thermal protection to complex, intelligent grid-compatible components. Manufacturers are now required to provide extensive testing data (E-E-A-T) to prove reliability under extreme environmental conditions, ranging from desert heat to high-altitude cold. China, particularly the Yueqing electrical cluster, has emerged as the global powerhouse for this manufacturing expertise.
Located in Yueqing, Zhejiang Province—the renowned electrical capital of China—Wenzhou Shuguang Fuse Co., Ltd. is a power technology enterprise integrating research, development, production, sales, and service. Our journey began in 1992 as the "Yueqing Shuguang Fuse Factory." Over three decades, we have evolved into a leading authority in high-voltage circuit protection.
As a designated manufacturer for the Ministry of Electric Power Industry, we specialize in high-voltage fuses, zinc oxide arresters, and high-voltage insulators. Our legacy is built on the philosophy of "Development by science and technology, and survival by quality."
Global utilities are upgrading to smart grids. This requires PT fuses with highly predictable time-current characteristics (TCC) to ensure coordination with digital protection relays. Our custom manufacturing allows for fine-tuning these parameters.
Wind and solar installations use voltage transformers in remote, harsh locations. Procurement leads now prioritize UV-resistant polymeric insulators and corrosion-resistant fuse caps to minimize maintenance costs in these inaccessible areas.
Global buyers from Southeast Asia, the Middle East, and Europe no longer accept "standard" products. They demand compliance with IEC 60282-1, DIN 43625, and ANSI C37.42—standards that Wenzhou Shuguang Fuse Co. strictly adheres to.
Ensuring absolute reliability through rigorous testing and international compliance.
Our products have passed the high-power test station of the Electric Power Research Institute of the Ministry of Electric Power, the National High-voltage Electrical Apparatus Quality Supervision and Inspection Center, and the Xi'an High-voltage Electrical Apparatus Research Institute. All performance tests are qualified.
Where our Custom PT Fuses make the difference.
Protecting secondary circuits and voltage transformers from power surges and network faults in municipal substations.
Securing high-load motor starters and transformers in steel mills, chemical plants, and mining operations.
Specialized oil-tight fuses designed for transformers where the fuse is submerged, requiring unique sealing tech.
High-speed fuses optimized for DC and AC protection in Electric Vehicle charging stations and PV inverters.
Unlike distributors, our direct factory status allows us to develop and prototype custom PT fuse links in weeks, not months. Our deep integration with the Yueqing electrical ecosystem provides us with immediate access to premium raw materials and high-precision testing labs.
The company has developed rapidly, and its economic and social benefits have improved significantly. By optimizing our process flow and using sophisticated testing equipment, we reduce waste and pass those cost savings directly to our global partners.
Our "Shu Rong" brand products have enjoyed a high reputation among domestic and foreign users. New products can be customized and produced at any time according to user needs, ensuring that whether you need an 82mm J-slotted fuse or a 36kV DIN standard HRC link, we have the capacity to deliver.
In recent years, the company has continued to deepen and improve the quality management system. High-quality raw materials and sophisticated testing equipment are the backing of our quality assurance system. All performance indicators are in line with the corresponding technical conditions.
Our major markets include Southeast Asia, the Middle East, Africa, and Europe. We have formed a complete sales network throughout China, supplying various provincial power companies. Our domestic product sales consistently rank among the top in the industry.
Browse our extensive range of high-voltage protective components.
